Solving the world's most intractable problems isn't just about great ideas and great intentions -- it requires a bolder way of thinking and doing. The most effective change-makers have learned to use their influence and resources in innovative ways to inspire others to join the crusade. Who are these visionaries taking risks, forging unexpected partnerships and changing the world? What can they teach us about inspiring and empowering others to take action? And how can we all challenge ourselves to better utilize our collective power to recognize and address the hardships others face?